Before We Startchoosehealth.utah.gov/healthcare/continuing-education...Zinman et al. 2015....
Transcript of Before We Startchoosehealth.utah.gov/healthcare/continuing-education...Zinman et al. 2015....
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Before We Start
• Presentation available for download at the end
• Q&A Box on the right
• Poll questions at the end – Thank you!
• Post‐test by March 29, 2017 (please use the same link you accessed the webinar with)
• Email questions or concerns: [email protected]
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Disclosures
• The Western Multi‐State Division is accredited as a provider of continuing nursing education by the American Nurses Credentialing Center’s Commission on Accreditation.
• Participants must complete the pre‐test, attend the entire live event, and complete the post‐test with a score of 80% or greater to earn one contact hour.
• No conflicts of interest are involved in this series. This includes no content relevant to commercial interest and no presence of commercial support.
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SGLT-2 Inhibitors for Type 2 Diabetes Mellitus: Protecting Kidneys and Heart
Amnon Schlegel, MD, PhDAssociate Professor of Internal Medicine and Biochemistry
Investigator, University of Utah Molecular Medicine Program
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Outline1. To learn how SGLT-2 controls renal glucose handling
2. To understand SGLT-2 Pharmacology
3. To review SGLT2 trials, including GLP-1 agonist and DDP4Icomparisons
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Outline1. Case
2. Physiology of Renal Glucose Handling
3. SGLT-2 Pharmacology
4. Trials, including GLP-1 agonist and DDP4I comparisons
5. Speculation on Mechanisms
6. Back to case
7. Framework for polypharmacy
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CaseA 62-year-old, white male truck driver with type 2 diabetes of 12 years duration complicated by non-proliferative retinopathy, and stage 3A CKD (eGFR 55 mL/min) is found to have a Hemoglobin A1c of 11.1%. He also has hypertension and mixed hyperlipidemia. He does not smoke tobacco. His 2013/16 ACC/AHA 10-year risk of an ASCVD event is 24.5%. BMI 34 kg/m2.
His medications are:Aspirin 81 mg dailyAtorvastatin 40 mg dailyChlorthalidone 25 mg dailyLisinopril 40 mg dailyMetformin 1,000 mg twice daily- started 10 years agoNifedipine extended release 60 mg daily
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Case 1
He refuses to initiate insulin because this will jeopardize his commercial drivers’ license.
He took pioglitazone and glimepiride for several years and does not want either again because of the weight gain and frequent hypoglycemia caused by these drugs, respectively.
Review of pharmacy records shows excellent adherence to his regimen (90 day supplies of each drug filled consistently).
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Case 1The patient agrees to begin exenatide 10 mcg bid, and after4 months, the Hemoglobin A1c decreases to 9.2%. He alsoloses 7 kg and sees his home blood pressure readings decrease to an average of 130 mm Hg systolic. He checks his capillary blood glucose twice daily, and has an median morning value of 175 mg/dL and a bed-time median value of 210 mg/dL.
At a return visit he agrees to begin empagliflozin 12.5 mg bidin combination with metformin 1000 mg.
He is counseled about maintaining adequate fluid intake.He is also instructed to go to the emergency room if hedevelops dysuria and to inform the treating physician thathe takes a drug that causes glycosuria.
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Outline1. Case
2. Physiology of Renal Glucose Handling
3. SGLT-2 Pharmacology
4. Trials, including GLP-1 agonist and DDP4I comparisons
5. Speculation on Mechanisms
6. Back to case
7. Framework for polypharmacy
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Proximal Tubular Physiology
SGLT-2High capacity Low affinity
SGLT-1Low capacity High affinity
Modified from Costanza 5th ed. (left); Vander’s 6th ed. (right).
Glu
cose
filte
red,
reab
sorb
ed,
or e
xcre
ted
(mg/
min
)
800
600
400
200
00 200 400 600 800
Reabsorbed
Threshold
Tm
Splay
Plasma Glucose(mg/dL)
2 K+
Glomerulus
Distal nephron
Glucose
Glucose
Glucose
Na+
2 Na+
3 Na+
ATP
Lumen
ADP + Pi
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Phlorhizin
Naturally occuring 2-glucoside of phloretinfound in the leaves, bark and seeds of:
ApplesPearsCherries
Reilly, Nolan and Lusk 1989. Am J Physiol 1:395-410.
Josef von Mering, MD was the first to show that Phlorhizin causes glycosuria
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Phlorizin is a non-selective SGLT inhibitor
SGLT-2
Poor oral bioavailabilityShort half lifeIntestinal angina from the delivery of glucose to the colonic flora
SGLT-1
2 K+
Glucose
Glucose
Glucose
Na+
2 Na+
3 Na+
ATP
Lumen
ADP + Pi
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Outline1. Case
2. Physiology of Renal Glucose Handling
3. SGLT-2 Pharmacology
4. Trials, including GLP-1 agonist and DDP4I comparisons
5. Speculation on Mechanisms
6. Back to case
7. Framework for polypharmacy
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Gliflozins Are Selective SGLT2 Inhibitors
canagliflozin(Invokana; Invokamet)
empagliflozin(Jardiance; Syngardy; Glyxambi)
dapagliflozin(Farxiga; Xigduo XR)
SGLT-2 2 K+
Glucose
Glucose
Glucose
Na+
2 Na+
3 Na+
ATP
Lumen
ADP + Pi
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What We Know About SGLT2 Inhibitors
Good:1. Weight loss (2 to 5 kg) – visceral and subcutaneous adipose (fat oxidative state)2. Decrease in blood pressure: natriuresis and osmotic diuresis3. Ketosis for optimal heart metabolism4. Modest A1c reduction when added to metformin
Bad:1. Candida albicans vulvovaginitis and C. balanitis in men2. UTI, both sexes3. Excessive ketoacidosis, with focus on acidemia4. AKI from excessive osmotic diuresis (FDA warning for cana-)5. Bone mineral loss (unclear mechanism; maybe no difference in fracture rate)6. Bladder cancer (dapa-unclear mechanism; part of label)7. Excess foot amputations (FDA warning for cana-)
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Cost and Drug Interactions
Ndefo et al. 2015. Empagliflozin (Jardiance): A Novel SGLT2 Inhibitor for the Treatment of Type-2 Diabetes. 40:364-8.
Drug Empagliflozin Canagliflozin DapagliflozinCost of 30-day supply 10 and 25 mg tablets; $411 100 and 300 mg tablets; $411 5 and 10 mg tablets; $412
Usual Dose 10 mg daily in the morning; may increase to 25 mg
100 mg daily before first meal; may increase to 300 mg once daily if eGFR >60
5 mg daily in the morning; may incrase to 10 mg
Drug Interactions No significant clinicalinteractions noted.
Canagliflozin expoure is reduced with rifampin, phenytoin, phenobarbital, ritonavir. Consider using 300 mg dose.
No significant clinicalinteractions noted.
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Outline1. Case
2. Physiology of Renal Glucose Handling
3. SGLT-2 Pharmacology
4. Trials, including GLP-1 agonist and DDP4I comparisons
5. Speculation on Mechanisms
6. Back to case
7. Framework for polypharmacy
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FDA Guidance on Diabetes Drugs
December 2008; US Department of Health and Human Services, FDA, CDER
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EMPA-REG OUTCOME Mortality Study
Zinman et al. 2015. Empagliflozin, Cardiovascular Outcomes, and Mortality in Type 2 Diabetes New Engl J Med 373:2117-2128
Criteria18 years and overEGFR >30 ml/min/1.73m2
BMI 45 kg/m2 or lessKnown CAD, CVA or PVD
A1c between 7 and 9%, with washout of all diabetes medications prior to start.
Primary Outcomedeath from CV causes, non-fatal MI, or non-fatal stroke.
Secondary OutcomePrimary + hospitalization for unstable angina.
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EMPA-REG OUTCOME Mortality Study
Zinman et al. 2015. Empagliflozin, Cardiovascular Outcomes, and Mortality in Type 2 Diabetes New Engl J Med 373:2117-2128
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EMPA-REG OUTCOME Mortality Study
Zinman et al. 2015. Empagliflozin, Cardiovascular Outcomes, and Mortality in Type 2 Diabetes New Engl J Med 373:2117-2128
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EMPA-REG OUTCOME Mortality Study
Zinman et al. 2015. Empagliflozin, Cardiovascular Outcomes, and Mortality in Type 2 Diabetes New Engl J Med 373:2117-2128
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EMPA-REG OUTCOME – It’s not glycemia
Zinman et al. 2015. Empagliflozin, Cardiovascular Outcomes, and Mortality in Type 2 Diabetes New Engl J Med 373:2117-2128
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Mortality Perspective—Intensive Glycemic Control Takes A Long Time to Matter in Type 2 Diabetes
Holman et al. 2008. 10-year follow-up of intensive glucose control in type 2 diabetes. New Engl J Med. 359:1577-89 .Hayward et al. 2015. Follow-up of glycemic control and cardiovascular outcomes in type 2 diabetes. New Engl J Med. 372: 2197-2206.
UKPDSHR, 0.73 (0.59-0.89)
VADT
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Metabolic Memory in VADT
Duckworth et al. 2009. Glucose control and vascular complications in veterans with type 2 diabetes. New Engl J Med. 360:129-39Hayward et al. 2015. Follow-up of glycemic control and cardiovascular outcomes in type 2 diabetes. New Engl J Med. 372: 2197-2206.
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Pace of Effect: Blood Pressure Control Is King
Abdul-Ghani et al. 2016. SGLT2 Inhibitors and Cardiovascular Risk: Lessons Learned from the EMPA-REG OUTCOME Study. Diabetes Care. 39:717-725.
LIPID ACCORD-BP
EMPA-REG RALES
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GLP-1 Interlude
Drucker DJ. 2016. The Cardiovascular Biology of Glucagon-like Peptide-1 Cell Metabolism 24:15-30.
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Exenatide (Extendin-4) is a Gila Monster Salivary Venom GLP-1 Agonist
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Liraglutide Lowers BP, too (LEADER)
Marso et al. 2016 Liraglutide and cardiovascular outcomes in type 2 diabetes. New Engl J Med. 375: 311-322.
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Liraglutide Lowers BP, too (LEADER)
Marso et al. 2016 Liraglutide and cardiovascular outcomes in type 2 diabetes. New Engl J Med. 375: 311-322.
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Other GLP1 Agonist Trials In the Works
Modified from Wilding, Rajeev and DeFronzo 2016. Positioning SGLT2 Inhibitors/Incretin-based therapies in the treatment algorithm. Diabetes Care. 39:S154-164.
Drug Trial, n Duration and Inclusion Primary OutcomeExenatide QR (2 mg weekly)
EXSCELn = 14,000
June 2010-April 2018;History of 0-3 oral antihyperglycemic agents; insulin alone or with 2 oral drugsA1c 6.5 to 10%Age > 18 years
Time to first CV event in the primary composite of CV death, nonfatal MI or nonfatal stroke
Liraglutide(1.2 and 1.8 mg OD)
LEADERn = 9,340
August 2010-November 2015Known CV, cerebrovascular or peripheral vascular disease or chronic renal failure or chronic heart failureA1c > 7%Age > 50 years
Time to first event included in the composite of CV death, MI or ischemic stroke
Lixisenatide(10 and 20 mcg daily)
ELIXA. n = 6,000
June 2010 to Feb 2015Minimum 2 years follow-upSpontaneous ACS admitted in last 180 daysA1c 5.5 to 11%Age > 30 years
Composite for CV death, nonfatal MI, nonfatal stroke or hospitalization for unstable angina
Dulaglutide(0.75 and 1.5 mg weekly)
REWINDn = 9,622
July 2011 to April 2019; median 3.1 yearsAge > 50 years with established clinical vascular diseaseAge > 55 years and subclinical vascular diseaseAge > 60 years and at least 2 CV risk factorsA1c < 9.5%
Time to first event included in the composite of CV death, MI or ischemic stroke
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DPP4 Inhibitors Are Safe, But not Magical
Scirica et al. 2013. Saxagliptin and cardiovascular outcomes in patients with type 2 diabetes mellitus. New Engl J Med. 369:1317-26.White et al. 2013. Alogliptin after Acute Coronary Syndrome in Patients with Type 2 Diabetes New Engl J Med. 369:1327-35.Green et al. 2015. Effect of sitagliptin on cardiovascular outcomes in type 2 diabetes. New Engl J Med 373:232-242.
TECOS
Savor-TIMI 53
Linagliptin: CAROLINA 6,000 subjects; CARMELINA 8,3000 subjects
EXAMINE
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Are SGLT2 Inhibitors All About Blood Pressure?
Abdul-Ghani et al. 2016. SGLT2 Inhibitors and Cardiovascular Risk: Lessons Learned from the EMPA-REG OUTCOME Study. Diabetes Care. 39:717-725.
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Are SGLT2 Inhibitors All About Blood Pressure?
Sattar et al. 2016. SGLT2 Inhibition and Cardiovascular Events: why did EMPA- REG Outcomes Surprise andwhat are the likely mechanisms. Diabetalogia. 59:1333-1339.
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Or Is It the “Super-Fuel” Ketones?
Ferrannini et al. 2016. CV Protection in the EMPA-REG OUTCOME Trial: A “Thrifty Substrate” Hypothesis.Diabetes Care. 39:1108-1114.
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EMPA-REG OUTCOME Renal Study
Wanner et al. 2016. Empagliflozin and progression of kidney disease in type 2 diabetesNew Engl J Med 2016. 375:323-334.
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EMPA-REG OUTCOME Renal Study
Wanner et al. 2016. Empagliflozin and progression of kidney disease in type 2 diabetesNew Engl J Med 2016. 375:323-334.
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EMPA-REG OUTCOME Renal Study
Wanner et al. 2016. Empagliflozin and progression of kidney disease in type 2 diabetes. New Engl J Med 2016. 375:323-334.
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EMPA-REG OUTCOME Renal Study
Wanner et al. 2016. Empagliflozin and progression of kidney disease in type 2 diabetes. New Engl J Med 2016. 375:323-334.
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EMPA-REG OUTCOME Renal Study
Wanner et al. 2016. Empagliflozin and progression of kidney disease in type 2 diabetes. New Engl J Med 2016. 375:323-334.
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All SGLT2 Inhibitors In
CV, cardiovascular; MACE, major cardiac adverse events; MI, myocardial infarction
Modified from Wilding, Rajeev and DeFronzo 2016. Positioning SGLT2 Inhibitors/Incretin-based therapies in the treatment algorithm. Diabetes Care. 39:S154-164.
Drug Trial, n Duration and Inclusion Primary OutcomeCanagliflozin CANVAS,
n = 4,411Dec 2009-April 2017;History of high risk for CV diseaseA1c 7 to 10.5%Age > 30 years
MACEs: CV death, nonfatal MI and non-fatal stroke
Dapagliflozin DECLARE- TIMI 58n = 17,150
April 2013-April 2019High risk for CV events with DM2Age > 40 years
Time to first event included in the composite of CV death, MI or ischemic stroke
Empagliflozin EMPA-REG OUTCOME. N = 7,034
July 2010 to April 2015; median 3.1 yearsHigh CV riskA1c 7 to 10%Age > 18 years
Composite of CV death, nonfatal MI or nonfatal stroke
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CANVAS Interim Report
Heerspink et al. Canagliflozin (CANA) slows progression of renal function decline independent ofof glycemic effects. Oral Presentation. American Diabetes Association Meeting. June 11, 2016 .
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Outline1. Case
2. Physiology of Renal Glucose Handling
3. SGLT-2 Pharmacology
4. Trials, including GLP-1 agonist and DDP4I comparisons
5. Speculation on Mechanisms
6. Back to case
7. Framework for polypharmacy
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Case Four months later, the patient reported a 5 kg weight loss. Hismorning blood glucose was consistently below 150 mg/dL.
He states that his primary care physician discontinuednifedipine, decreased the chlorthalidone to 12.5 mg daily, and decreased the lisinopril dose to 30 mg daily because his home and ambulatory blood pressure readings showed a 5 mm Hg drop to an average of 127 mm Hg systolic (he had experienced a 7 mm Hg drop after startingexenatide, 4 months prior).
The Hemoglobin A1c after this visit was 7.1%. Review of hisglucometer readings showed no hypoglycemic episodes.
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Outline1. Case
2. Physiology of Renal Glucose Handling
3. SGLT-2 Pharmacology
4. Trials, including GLP-1 agonist and DDP4I comparisons
5. Speculation on Mechanisms
6. Back to case
7. Framework for polypharmacy
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Empagliflozin-Linagliptin Synergy
DeFronzo et al. 2015 Combination of empagliflozin and linagliptin as second-line therapy in subjects withtype 2 diabetes inadequately controlled on metformin. Diabetes Care. 38:384-93. Erratum 1173.
On a bed of Metformin
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When?
Wilding, Rajeev and DeFronzo 2016. Positioning SGLT2 Inhibitors/Incretin-based therapies in the treatment algorithmDiabetes Care. 39:S154-164.http://www.kevinmd.com/blog/2016/08/dont-love-specialty-heres.html